<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>受限页面</title>
    <!-- 引入Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
</head>
<body>
    <div class="container">
        <div class="row justify-content-center mt-5">
            <div class="col-md-6">
                <div class="card">
                    <div class="card-header bg-danger text-white">
                        <h4 class="mb-0">警告</h4>
                    </div>
                    <div class="card-body">
                        <p class="card-text">您没有访问该页面的权限。</p>
                    </div>
                </div>
            </div>
        </div>
    </div>
 
    <!-- 引入Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
</body>
</html>